CaribSea Aragonite buffers to the highest pH and delivers more calcium, carbonate, and trace elements than any other substrate. Little or no rinsing required, aragonite keeps aquariums healthier, longer.

At CaribSea they take the aquarium hobby seriously. Since 1972 they have supplied hundreds of thousands of aquarists, public aquariums, and mariculture facilities with millions of pounds of the highest quality marine substrates. CaribSea substrates have become the backbone of today's cutting edge marine systems with a miracle mineral called aragonite. CaribSea, in an exclusive contract with the only aragonite mine in the world, supplies aquarists with 10 grades of aragonite "crushed coral." Now every hobbyist, from beginner to reef keeper, can enjoy this revolution in aquarium keeping.